import java.util.*;

/**
 * Created with Intellij IDEA.
 * Description:
 * User: 33013
 * Date: 2023-05-03
 * Time: 13:46
 */
public class Test {
    public static void main(String[] args) {
        Queue<Integer> deque = new LinkedList<>();
        Stack<Integer> stack = new Stack<>();
        stack.push();
        stack.pop();
        List<Integer> list = new ArrayList<>();
        deque.toArray();//
        Queue<Integer> queue = new PriorityQueue<>();
        queue.toArray();
    }
}
